Intake-manifold heater



Nov. 4 1924.

W. A. YOUNG ET AL INTAKE MANIFOLD HEATER Original Filed April 20. 1921 "IIll!lIIlIIllIllllllllllllwllllllllllllllllllllllllllf G-R-Moore.

Patented Nov. 4, 1924.

ATES

WILLIAM A. YOUNG AND GEORGE E. MOORE, 0F MEDFOR'D, OREGON.

INTAKE-MANIFOLD HEATER.

Application filed April 20, 1921 Serial no. 462,782. Renewed November 7, 1923.

To all whom it may concern: 1

Be it known that we, IVILLIAM A. YOUNG and GEORGE R. Moonn, citizens of the United States, residing at Medford, in the county of Jackson and State of Oregon, have in vented certain new and useful Improvements in. Intake-Manifold Heaters, of which the following is a specification. v I

This invention relates to an improved manifold heater for internl combustion engines, being particularly adapted for use on engines of Chevrolet design, and has asone of its principal objects to provide aparticiu larly simple and at the same time eflicient device of this character which will utilize the heat of the exhaust gases of an engine for heating the wallsof the engine intake manifold.

The invention has as a further object to provide a device which may be readily applied and which will require no structural change in the intake manifold.

And the invention has as a still further object to provide a device which may be produced at moderate cost and which, in practical use, will not be likely to get out of order so as to need attention or repair.

Other and incidental objects will appear hereinafter.

In the drawing:

Figure 1 is a fragmentary side elevation showing a conventional engine of Chevrolet design equipped with our device,

Figure 2 is a transverse sectional view showing the manner in which the device surrounds the branches of the intake manifold of the engine.

Figure 3 is a perspective view showing the;1 heating jacket of the device in detail, an

Figure 4; is a fragmentary section showing the connection between the inlet pipe employed and the exhaust manifold of the engine.

Referring now more particularly to the drawing, we have, for convenience, shown our improved device in connection with a conventional engine 10 of Chevrolet design. However, we do not limit ourselves in this regard since, as will appear as the description proceeds, the heater may be employed in connection with other engines and will prove highly effective wherever found applicable. The intake manifold of the engine is indicated at 11 and the exhaust manifold at 11, the intake manifold being formed with 'avert-icallydisposed trunk from which lead oppositely directed lateral branches connected to' the engine head.

In carrying the invention into effect, we employ cylindrical jacket 12. This jacket is preferably formed of suitable thin resilient sheet metal and is split from end to end thereof. Shaped to close the jacket at its ends are end rings 13 each secured for a portion'of its outer circumference to the jacket. Each ring will thus. tie a portion of one end of the acket against circumferential flexing whlle the remaining portion of said end is'free. Like the jacket, the end rings are alsopreferably constructed of suitable resilient sheet metal and at thelower side of the jacket said rings are split, the split in each ring registering with the split in the jacket and the ring atone side of the split being free of the jacket, as shown clearly in Fig. 3. Formed in the lower side of thejacketfatthe split therein is a medially disposedcircular opening 14L and extending through the bottom of the jacket at said split is an outlet tube 15 located near one end ofthe jacket and suitably secured to the acket wall. Entering the acket at its upper side is an inclined inlet tube 16 which may also be secured to the jacket wall. As will be observed, the jacket is provided with a semi-circular notch 17 in one side of the split adapted to snugly fit about the tube 15 so that the edges of the jacket at the split may be brought together forming a closed joint. The outer ends of the tubes 15 and 16 are split and extending laterally from each of said tubes, is a pair of spaced ears 18 through which is freely engaged a cl amping bolt 19.

To apply the jacket, the front portion thereof is inserted behind. the branches of the manifold 11 and then brought forwardly over said branches, and free portions of the end rings 13 being coincidentally engaged. around the branches. The opening 14. in the jacket wall is of a size to snugly receive the trunk of the manifold therethrough so that the edges of the jacket may be brought into abutting relation and then joined in any convenient or preferred manner. The free portions of the end rings 13 may then also be connected to the wall of the jacket at its ends for closing the joints between said rings and the jacket and, preferably,

tightly closed joints are then formed between the end rings and the branches of i, inlet tube 16 of the jacket. Leading from the tube is a similar outlet pipe 21, the

pipes being secured Within said tubes by the clamping bolts 19.

As Will now be readily understood in view of the preceding description, when starting the engine, exhaust gases from an initial explosion in any one of the engine cylinders will be diverted through the pipe 20' into the jacket to circulate Within the jacket around the intake manifold and finally flow out through the pipe 21, being confined by the jacket about the manifold, so that the portion of the intake manifold enclosed by the heater Will, inturn, be heated. Consequently, fuel gases flowing through the manifold will, upon coming in contact with the heated portions of the Walls thereof, be considerably raised in temperature While any particles of liquid fuel in the mixture Will be vaporized so that the engine may be quickly started. Furthermore, the presence of the jacket upon the manifold Will,'under working conditions, serve to maintain the manifold constantly heated to facilitate vaporization of fuel mixture and increase the efficiency of the engine.

Having thus described the invention, What is claimed as new is:

1. An intake manifold heater including a split resilient jacket adapted to be sprung over the manifold, and end members each secured for a portion of the length of the outer edge thereof to the jacket, the end members constituting closures for thejacket.

2. An intake manifold heater including a longitudinally split resilient jacket, and radially split end rings each having its split alined Withthe split in the jacket and each secured at one side of the split therein for a portion ofthe length of its outer edge to the jacket, said rings constituting closures for the jacket.

3. An intake manifold heater including a split resilient jacket, split end rings formingend closures for the jacket and each attached along a portion of its outer edge to the jacket and having its remaining portion free, and radially disposed inlet and outlet tubes carried by the jacket, the outlet tube being located at the split in the jacket.

In testimony whereof" We affix our signatures.

WILLIAM A. YOUN Gr. [1 s.] GEORGE R. MOORE. [L.S.] 

